AB-410 Building The Apps Practice Test 2 — 15 Questions

Question 1

Which TWO are valid methods to trigger a Power Automate flow from an app?

Accepted Answer

Dataverse events (e.g., Row Added). Option D (Dataverse events such as Row Added) is correct because Power Automate flows can be configured with a Dataverse trigger, and when the underlying table row is created or modified by the app, the platform event fires the flow automatically without any user interaction in the app. Option E (OnSelect property of a button) is correct because Power Apps can invoke a flow directly from a control's OnSelect property using the flow's bound method (e.g., MyFlow.Run()), which is the standard way to trigger a flow from a user action in the app. The remaining options do not belong: opening the browser (A) is a client action unrelated to flow invocation, changing the app theme (B) is a design-time setting with no trigger semantics, and dragging a control (C) is an authoring gesture in the designer, not a runtime event that can start a flow.

Answer

Opening the browser

Answer

Changing the app theme

Answer

Dragging a control

Question 2

You are building a canvas app that must display a list of 10,000 customer records from a Microsoft Dataverse table in a gallery. Users report that the gallery takes several seconds to render and occasionally shows incomplete data. You need to improve performance while ensuring the gallery displays the correct records. What should you do?

Accepted Answer

Set the gallery's Items property to a Filter or Search expression that limits the returned records, and enable 'Delay output' on the data source.. The correct approach is to limit the records returned to the gallery using a Filter or Search expression and to enable 'Delay output' on the data source. This reduces the amount of data transferred and rendered, improving speed, and ensures the gallery displays the correct filtered subset. Increasing the data row limit or changing the control type does not solve the underlying issue of loading too many records.

Answer

Increase the 'Data row limit' in the app settings to 20,000.

Answer

Enable the 'Use Power Apps for Windows' setting in the app settings.

Answer

Replace the gallery with a Data table control and set its Items property to the full table.

Question 3

You are building a canvas app that calls an Azure OpenAI model through a Power Automate cloud flow. The response from the model must appear in a label on the same screen without the user navigating away or manually refreshing. You add the flow to the app from the Data pane. Which control or mechanism should you use to display the model's return value on the screen?

Accepted Answer

Bind the label's Text property directly to the flow's output object, for example FlowName.Run(input).response.. Invoking the flow from the label's Text property with FlowName.Run(input).response runs the flow and returns its output synchronously, so the generated text renders immediately on the same screen. This avoids navigation, manual refresh, and extra state, which the other approaches either require or fail to deliver.

Answer

Configure the label's OnSelect property to call the flow and set the label text when the user taps it.

Answer

Use the Set() function in the screen's OnVisible property to assign the flow output to a variable and bind the label to that variable.

Answer

Store the flow output in a collection with Collect() and bind the label to First(MyCollection).

Question 4

You are building a canvas app for an insurance company. The app uses a SQL Server table named Policies that contains 40,000 rows. Users report that a gallery showing policies filtered by CustomerID loads slowly and sometimes returns incomplete results. The app currently uses the formula Filter(Policies, CustomerID = varCustomerID) in the gallery's Items property. What should you do to improve performance and ensure complete results?

Accepted Answer

Keep the formula but ensure the CustomerID column is indexed in SQL Server and use the 'Filter' function with the '=' operator, which is delegable.. The core issue is delegation: Power Apps can only retrieve a limited number of rows from a large SQL table unless the filter is delegated. Using a delegable operator such as '=' on an indexed column pushes the filter to SQL Server, returning complete and faster results. Options that change display settings or add views do not fix the delegation limit.

Answer

Enable the 'Explicit column selection' setting and replace the formula with a stored procedure call.

Answer

Replace the formula with Filter(Policies, CustomerID = varCustomerID) but set the gallery's 'Load data' property to 5000.

Answer

Use the formula Filter(Policies, CustomerID = varCustomerID) but first create a view in SQL Server that filters by CustomerID and connect to that view.

Question 5

You are building a canvas app that must let users capture a photo on a mobile device and store the image inside a Dataverse table's File column. The app runs in Power Apps mobile on Android and iOS. You need to configure the control and the save operation with the least custom code. What should you do?

Accepted Answer

Add a Camera control, then on its OnSelect use Patch to write a record with the File column set to Last(Camera1.Photo).. The Camera control is the only native control that captures a new photo and exposes it as a media value compatible with Dataverse File columns. Combining it with a Patch call that references the control's Photo property delivers the binary payload to the table in one step, avoiding custom connectors or base64 encoding while remaining portable across Android and iOS.

Answer

Add an Image control, set its Image property to Camera1.Stream, and use the form's OnSuccess to upload the stream.

Answer

Add an Add Picture control, then use Collect to append the image to a collection and SubmitForm to persist it.

Answer

Add a Barcode scanner control and bind its value to the File column, then call SaveData to persist.

Question 6

A maker is building a canvas app that calls a Microsoft Copilot Studio agent from a Power Apps button. The agent returns a long JSON payload, and the maker wants to display only the value of the 'summary' field in a label named lblSummary. Which expression should the maker use?

Accepted Answer

Set the Text property of lblSummary to agentResponse.summary. The correct approach is to set the Text property of the label directly to the expression that retrieves the summary field from the agent response. Power Apps uses a declarative binding model where you assign expressions to properties in the property pane or formula bar, without an equals sign. If the response is a record, dot notation is appropriate. Using Set or equals signs is invalid syntax.

Answer

lblSummary.Text = First(agentResponse).summary

Answer

Set(lblSummary.Text, agentResponse.summary)

Answer

lblSummary.Text = agentResponse.summary

Question 7

You are creating a model-driven app for a hospital's patient intake process. The app must allow nurses to quickly register new patients and view a timeline of previous visits. You need to configure the app's site map and forms to meet these requirements. Which TWO actions should you perform? (Choose two.)

Accepted Answer

Use the site map designer to add the Patient table under a new area named 'Intake' and set the default form to the main form.. The requirements are quick registration and a timeline of previous visits. Adding the Patient table with a main form containing a timeline control provides the timeline view. Using the site map designer to place the table under an Intake area with the main form as default ensures quick access. Together, these two actions satisfy the scenario.

Answer

Create a canvas app page within the model-driven app for patient registration and embed it using an iframe.

Answer

Create a business rule that sets the Patient status to 'Active' when a new record is created.

Answer

Enable the 'Mobile offline' capability for the app and configure synchronization filters for the Patient table.

Question 8

You are building a Power Apps canvas app that reads from a Dataverse table named Project. The app must display a read-only summary of the current user's project count on the home screen, and the count must update automatically whenever a project is added elsewhere in the app. Which approach should you use?

Accepted Answer

Add a Label control and set its Text property to CountRows(Project).. A Label whose Text is bound to CountRows(Project) recalculates whenever the underlying Dataverse table changes, which satisfies the automatic-update requirement. CountRows is the correct aggregate for counting records in a table, and binding it directly to a display control gives a reactive read-only summary. Approaches that require user action or that copy data into a local collection do not refresh automatically and do not meet the scenario.

Answer

Add a Label control and set its Text property to Sum(Project, 1).

Answer

Add a Label control and set its Text property to CountRows(Filter(Project, Owner = User().Email)).

Answer

Add a Button control and set its OnSelect property to ClearCollect(colProjects, Project).

Question 9

A canvas app reads a Dataverse table named Orders that contains 40,000 rows. Users report that a gallery filtered with Filter(Orders, Status = "Open") returns only the first 500 rows and ignores the rest. The Status column is a choice column. You need the gallery to show every matching row without changing the table schema. Which approach meets the requirement?

Accepted Answer

Use Filter(Orders, Status.Value = "Open") and confirm the Status column is delegable, so the query executes server-side.. Delegation determines whether a filter runs on the service or locally. Choice columns in Dataverse are delegated only when compared through their Value sub-property, so filtering on Status.Value = "Open" sends the predicate to Dataverse and returns every matching row, bypassing the app's data row limit. Referencing the choice column without .Value falls back to local filtering and truncates the results.

Answer

Set the app's data row limit for the Orders data source to 2000 and enable the delegation warning suppression.

Answer

Add the Status column to a view and set the gallery's Items to the view name, relying on server-side filtering.

Answer

Wrap the gallery in a ForAll loop that pages through Orders using FirstN and Skip, then concatenate the results.

Question 10

You are building a canvas app that retrieves a large dataset from Microsoft Dataverse. Users report that the app takes a long time to load the initial screen. You need to reduce the startup time by ensuring that data is not loaded until it is actually needed. What should you do?

Accepted Answer

Enable the 'Delay load' option for the data source in the app settings.. Delay load is designed to improve app startup performance by postponing data retrieval until the data is actually needed. In a canvas app, enabling this option for a data source prevents the initial screen from waiting for large datasets to load, which directly addresses the slow startup issue.

Answer

Use the Concurrent function to load all data sources simultaneously.

Answer

Set the OnStart property of the App to clear the data cache.

Answer

Replace the Dataverse connector with a custom connector that implements pagination.

Question 11

You are building a canvas app for a field service team. The app must show a list of work orders from a Microsoft Dataverse table. The team needs to see only work orders assigned to them, sorted by scheduled date. You have added a Gallery control and set its Items property to the Work Orders table. What should you change the Items property to so the gallery shows the correct records in the correct order?

Accepted Answer

Sort(Filter('Work Orders', 'Assigned To'.Email = User().Email), 'Scheduled Date'). The gallery needs a table result that is both filtered to the current user and sorted by date. Filter returns the subset of work orders assigned to the signed-in user, and Sort arranges them by Scheduled Date. Accessing the lookup's Email property with dot notation is required because Assigned To is a relationship, not a text field.

Answer

Search('Work Orders', User().Email, 'Assigned To')

Answer

LookUp('Work Orders', 'Assigned To'.Email = User().Email)

Answer

Filter(Sort('Work Orders', 'Scheduled Date'), 'Assigned To' = User().FullName)

Question 12

A developer is embedding a Power Apps canvas app into a Microsoft Teams channel. The app uses a custom connector that authenticates with OAuth 2.0. Users report that the app works in the browser but fails to load data in Teams. What is the most likely cause?

Accepted Answer

The custom connector's OAuth settings do not include the Teams redirect URI.. Embedding a canvas app in Teams changes the authentication context. Custom connectors using OAuth 2.0 must have the correct redirect URI for Teams. If the URI is missing, the connector cannot complete the OAuth handshake, so data calls fail. The app may still render, but data operations error out. Adding the Teams redirect URI to the connector's OAuth settings resolves the issue.

Answer

The canvas app uses a SharePoint list that exceeds the delegation limit.

Answer

The app's data source is not configured for offline use.

Answer

The Teams channel does not have the Power Apps license assigned to users.

Question 13

You are building a canvas app that must call an Azure AI model through a Power Automate flow and display the result. You want the app to handle errors gracefully and give the user feedback. Which TWO actions should you perform? (Choose two.)

Accepted Answer

Configure the flow to use a Try-Catch pattern with a Scope action and a Respond to Power Apps action that returns a status field.. IfError in the canvas app catches a failed flow call and lets you show a friendly message, while a Try-Catch Scope pattern in the flow returns a structured status field through Respond to Power Apps. Together they cover both client and server error handling, giving the user clear feedback instead of silence.

Answer

Use the Notify function in the flow's Run expression to display a toast message to the user.

Answer

Set the canvas app's OnError property to restart the app whenever the flow call fails.

Answer

Enable the flow's 'Respond to Power Apps' action to include the raw HTTP status code and bind the label to it.

Question 14

You are configuring a canvas app screen that must expose its data operations to Microsoft Copilot Studio so an agent can query open work orders and update their priority. Which TWO steps are required to let the agent perform these actions? (Choose two.)

Accepted Answer

Add the canvas app as a tool in the Copilot Studio agent and select the specific app actions to expose.. Copilot Studio agents reach canvas apps by registering the app as a tool and then invoking discrete actions defined inside the app. Registering the tool and selecting the exposed actions gives the agent a callable surface, while defining the open-work-order query and the priority update as named Power Fx actions supplies the behavior. Both steps are mandatory for the agent to read and modify work orders.

Answer

Convert the canvas app to a model-driven app so Copilot Studio can read its sitemap.

Answer

Enable the Data row limit override and set it to the maximum value for the app's data source.

Answer

Publish the app to the same environment and share it with the Copilot Studio service principal.

Question 15

You are building a canvas app that uses a custom connector to an Azure Function. The function returns a JSON array of items. You need to display these items in a gallery and allow users to filter by a category field. The connector's response is not automatically recognized as a table. What should you do to make the data usable in the gallery?

Accepted Answer

Configure the custom connector to return a schema that defines the response as a table, then use the connector's output directly in the gallery.. Defining a response schema in the custom connector tells Power Apps the structure of the returned data, making it available as a table. This enables direct binding to a gallery and supports filtering. Other methods require additional parsing steps and do not provide the same seamless integration or delegation support.

Answer

Use the Collect function to add the JSON response to a collection, then use the collection in the gallery.

Answer

Store the JSON response in a variable using Set, then use the variable in the gallery's Items property.

Answer

Use the ParseJSON function to convert the response into a table, then use the resulting table in the gallery's Items property.